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Yolk-shell structured Gd2O3:Eu3+ phosphor prepared by spray pyrolysis: Effect of preparation conditions on microstructure and luminescence properties

26-11-2014 | Jung Sang Cho; Kyeong Youl Jung; Yun Chan Kang, Physical Chemistry Chemical Physics, 2014

Gd2O3:Eu3+ yolk–shell phosphor powders with high photoluminescence intensity were prepared by spray pyrolysis. Preparation temperature and spray solution concentration were varied to find the optimum process conditions for preparation of Gd2O3:Eu3+ with yolk-shell structure. The formation ...

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Uranyl extraction by N,N-dialkylamide ligands studied using static and dynamic DFT simulations

26-11-2014 | Nicolas Sieffert; Georges Wipff, Dalton Transactions, 2014

We report DFT static and dynamic studies on uranyl complexes [UO2(NO3)x(H2O)yLz]2−x involved in the uranyl extraction from water to an “oil” phase (hexane) by an amide ligand L (N,N-dimethylacetamide). Static DFT results “in solution” (continuum SMD models for water and hexane) predict that the ...

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Facile control of copper nanowire dimensions via the Maillard reaction: using food chemistry for fabricating large-scale transparent flexible conductors

25-11-2014 | M. Kevin; Gregory Y. R. Lim; G. W. Ho, Green Chemistry, 2014

Solution-grown copper nanowires (Cu NWs) are promising substitutes for vacuum deposited transparent conducting oxide films. Here, we shed new light on the synthetic chemistry of Cu NWs, showing that their formation can occur as part of Maillard's reaction, a reaction more commonly associated with ...

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From oligomers towards a racemic crystal: molecular simulation of DL-norleucine crystal nucleation from solution

25-11-2014 | Dirk Zahn; Philipp Ectors; Patrick Duchstein, CrystEngComm, 2014

We elucidate the evolution of forming nuclei leading towards a racemic molecular crystal by means of computer simulation. Our simulations start with the association of individual D- and L-norleucine molecules and subsequent formation of aggregates, and thus provide molecular scale insights into ...

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Synthesis of ZrO2/Carbon Aerogel Composite with Tetragonal ZrO2 Structures Assisted by the Formation of Phenol-Formaldehyde Resin

25-11-2014 | Yi-Feng Lin; Fang-Ling Liang, CrystEngComm, 2014

In this study, monoclinic ZrO2 nanoparticles were successfully prepared using a hydrothermal process. When phenol was added to the resulting solution for the hydrothermal reaction, ZrO2/phenol formaldehyde (PF) resins with tetragonal ZrO2 crystalline phases were synthesized. Tetragonal ZrO2 ...

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Highly Porous Materials as Tunable Electrocatalysts for the Hydrogen and Oxygen Evolution Reaction

22-11-2014 | Marc Ledendecker, Guylhaine Clavel, Markus Antonietti, Menny Shalom, Advanced Functional Materials, 2014

The facile preparation of highly porous, manganese doped, sponge‐like nickel materials by salt melt synthesis embedded into nitrogen doped carbon for electrocatalytic applications is shown. The incorporation of manganese into the porous structure enhances the nickel catalyst's activity for the ...

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Kitaigorodsky Revisited: Polymorphism and Mixed Crystals of Acridine/Phenazine

21-11-2014 | Einat Schur, Elisa Nauha, Matteo Lusi, Joel Bernstein, Chemistry - A European Journal, 2014

Abstract Non‐stoichiometric molecular mixed crystals have potential as functional materials, the properties of which can be tailored by rationally changing their composition. The guidelines for their preparation were summarized over thirty years ago by Alexander Kitaigorodsky. Here those ...

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Soft Processing of Graphene Nanosheets by Glycine‐Bisulfate Ionic‐Complex‐Assisted Electrochemical Exfoliation of Graphite for Reduction Catalysis

20-11-2014 | Kodepelly Sanjeeva Rao, Jaganathan Sentilnathan, Hsun‐Wei Cho, Jih‐Jen Wu, Masahiro Yoshimura, Advanced Functional Materials, 2014

This study demonstrates a mild, environmentally friendly, and cost‐effective soft processing approach for the continuous synthesis of high‐quality, few‐layer graphene nanosheets. This has been achieved via electrochemical exfoliation of graphite, using an environmentally friendly ...

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ChemInform Abstract: Kinetics vs. Thermodynamics: A Unique Crystal Transformation from a Uranyl Peroxo‐Nanocluster to a Nanoclustered Uranyl Polyborate.

20-11-2014 | Yingjie Zhang, Mohan Bhadbhade, Jason R. Price, Inna Karatchevtseva, David Collison, Gregory R. Lumpkin, ChemInform, 2014

Abstract Reaction of UO2(NO3)2, NaOH, H2O2, and H3BO3 in aqueous solution leads to the formation of yellow crystals of Na14 [(UO2)(O2)1.5] 28·nH2O (I) at pH 8.5 within a few days, followed by transformation of (I) at room temperature to light yellow‐green crystals of Na6 [UO2{B16O24(OH)8}] ...

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Eliminating the Trade‐Off between the Throughput and Pattern Quality of Sub‐15 nm Directed Self‐Assembly via Warm Solvent Annealing

19-11-2014 | Jong Min Kim, YongJoo Kim, Woon Ik Park, Yoon Hyung Hur, Jae Won Jeong, Dong Min Sim, Kwang Min Baek, Jung Hye Lee, ..., Advanced Functional Materials, 2014

The directed self‐assembly (DSA) of block copolymers (BCPs) has been suggested as a promising nanofabrication solution. However, further improvements of both the pattern quality and manufacturability remain as critical challenges. Although the use of BCPs with a high Flory‐Huggins interaction ...

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